Centos – fstab entry causes emergency mode on reboot

centosfedorafstab

I am using a loop file system because I do not have another partition to mount and I am only practicing as I study for my sysadmin exam. I added the following line to my stab

/tmp/imagefile        mnt/tempdir     ext4    defaults        0 0

— this was done after creating a 1 mb file using the dd command and successfully mounting it manually using the mount command. However when I added this line to fstab and rebooted it restarted into emergency mode. I was able to edit the file in emergency mode and removing the line allowed a normal reboot. This happened on two systems a centos 7 system and a fedora 20 system.

Best Answer

For a loopback mount, you would want to invoke mount with -o loop, so change defaults to loop.

Also, give an absolute path to /mnt/tempdir.

After editing fstab, verify that you can run mount /mnt/tempdir, and if so, it should work on the next boot.

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